From fc73e7cd66bc808082e9994310fe6cf7010ed3de Mon Sep 17 00:00:00 2001
From: xkonni <konstantin.koslowski@gmail.com>
Date: Sun, 4 Nov 2012 23:06:32 +0100
Subject: [PATCH] daemon: initial commit

The daemon is running continuously and waits for commands to control all remote plugs.
See daemon.cpp for instructions.
---
 .gitignore |   1 +
 Makefile   |  13 ++--
 daemon.cpp | 183 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 daemon.h   |   8 +++
 4 files changed, 200 insertions(+), 5 deletions(-)
 create mode 100644 daemon.cpp
 create mode 100644 daemon.h

diff --git a/.gitignore b/.gitignore
index 9daeafb..f6062b6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 test
+daemon
diff --git a/Makefile b/Makefile
index 364ec45..fc6912b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,17 @@
-DESCRIPTION = "makefile"
+DESCRIPTION = "RCSwitch on Raspberry Pi"
 LICENSE = "GPL"
 VERSION = 1.0
 
 CC      = g++
-CFLAGS += -L/usr/local/lib
 CFLAGS += -lwiringPi
 
+default: daemon
 
-default:
-  $(CC) -Wall test.cpp RCSwitch.cpp -o test $(CFLAGS)
+daemon: daemon.cpp
+	$(CC) -Wall daemon.cpp RCSwitch.cpp -o daemon $(CFLAGS)
+
+test: test.cpp
+	$(CC) -Wall test.cpp RCSwitch.cpp -o test $(CFLAGS)
 
 clean:
-  rm -f test
+	rm -f test daemon
diff --git a/daemon.cpp b/daemon.cpp
new file mode 100644
index 0000000..7520544
--- /dev/null
+++ b/daemon.cpp
@@ -0,0 +1,183 @@
+/**
+ * RCSwitch daemon for the Raspberry Pi
+ *
+ * Setup
+ *   Power to pin4
+ *   GND   to pin6
+ *   DATA  to pin7/gpio4
+ *
+ * Usage
+ *   send xxxxxyyz to ip:port
+ *   xxxxx  encoding
+ *          00001 for first channel
+ *   yy     plug
+ *          01 for plug A
+ *   z      action
+ *          0:off|1:on|2:status
+ *
+ *  Examples of remote actions
+ *    Switch plug 01 on 00001 to on
+ *      echo 00001011 | nc 192.168.1.5 12345
+ *
+ *    Switch plug 01 on 00001 to off
+ *      echo 00001010 | nc 192.168.1.5 12345
+ *
+ *    Get status of plug 01 on 00001
+ *      echo 00001012 | nc 192.168.1.5 12345
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+#include "daemon.h"
+#include "RCSwitch.h"
+
+int main(int argc, char* argv[]) {
+  /**
+   * setup RCSwitch
+   */
+  RCSwitch mySwitch = RCSwitch();
+  usleep(50000);
+  mySwitch.enableTransmit(4);
+  usleep(50000);
+
+
+  nPlugs=10;
+  int nState[nPlugs];
+  memset(nState, 0, sizeof(nState));
+
+  /**
+   * setup socket
+   */
+  int sockfd, newsockfd, portno;
+  socklen_t clilen;
+  char buffer[256];
+  struct sockaddr_in serv_addr, cli_addr;
+  int n;
+  sockfd = socket(AF_INET, SOCK_STREAM, 0);
+  if (sockfd < 0)
+    error("ERROR opening socket");
+  bzero((char *) &serv_addr, sizeof(serv_addr));
+  portno = PORT;
+  serv_addr.sin_family = AF_INET;
+  serv_addr.sin_addr.s_addr = INADDR_ANY;
+  serv_addr.sin_port = htons(portno);
+  if (bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0)
+    error("ERROR on binding");
+
+  /*
+   * start listening
+   */
+  while (true) {
+    listen(sockfd,5);
+    clilen = sizeof(cli_addr);
+    newsockfd = accept(sockfd,
+                (struct sockaddr *) &cli_addr,
+                &clilen);
+    if (newsockfd < 0)
+      error("ERROR on accept");
+    bzero(buffer,256);
+    n = read(newsockfd,buffer,255);
+    if (n < 0)
+      error("ERROR reading from socket");
+
+
+    if (strlen(buffer) > 8) {
+      for (int i=0; i<5; i++) {
+        nGroup[i] = buffer[i];
+      }
+      nGroup[5] = '\0';
+
+      for (int i=5;i<7; i++) {
+        nSwitchNumber = buffer[i]-48;
+      }
+      nAction = buffer[7]-48;
+    }
+    else {
+      printf("message corrupted or incomplete");
+    }
+
+    /**
+     * handle messages
+     */
+    int nAddr = getAddr(nGroup, nSwitchNumber);
+    char msg[13];
+    if (nAddr > nPlugs)
+      printf("Switch invalid: %s::%d\n", nGroup, nSwitchNumber);
+    else {
+      switch (nAction) {
+        /**
+         * off
+         */
+        case 0:
+          mySwitch.switchOff(nGroup, nSwitchNumber);
+          nState[nAddr] = 0;
+          sprintf(msg, "nState[%d] = %d", nAddr, nState[nAddr]);
+          n = write(newsockfd,msg,14);
+          break;
+        /**
+         * on
+         */
+        case 1:
+          mySwitch.switchOn(nGroup, nSwitchNumber);
+          nState[nAddr] = 1;
+          sprintf(msg, "nState[%d] = %d", nAddr, nState[nAddr]);
+          n = write(newsockfd,msg,14);
+          break;
+        /**
+         * status
+         */
+        case 2:
+          printf("nState[%d] %d\n", nAddr, nState[nAddr]);
+          sprintf(msg, "nState[%d] = %d", nAddr, nState[nAddr]);
+          n = write(newsockfd,msg,14);
+          break;
+      }
+    }
+
+    if (n < 0)
+      error("ERROR writing to socket");
+  }
+
+  /**
+   * terminate
+   */
+  close(newsockfd);
+  close(sockfd);
+  return 0;
+}
+
+/**
+ * error output
+ */
+void error(const char *msg)
+{
+    perror(msg);
+    exit(1);
+}
+
+/**
+ * calculate the array address of the power state
+ */
+int getAddr(const char* nGroup, int nSwitchNumber) {
+  int bin = atoi(nGroup);
+  int base = 1;
+  int dec = 0;
+  int digit;
+
+  while(bin!=0)
+  {
+       digit=bin%10;
+       dec=dec+digit*base;
+       bin=bin/10;
+       base=base*2;
+    }
+
+  return (dec-1)*5+nSwitchNumber-1;
+}
+
diff --git a/daemon.h b/daemon.h
new file mode 100644
index 0000000..1540cc0
--- /dev/null
+++ b/daemon.h
@@ -0,0 +1,8 @@
+char nGroup[6];
+int nSwitchNumber;
+int nAction;
+int nPlugs;
+int PORT = 12345;
+
+void error(const char *msg);
+int getAddr(const char* nGroup, int nSwitchNumber);